(, ) , , ( ).
, .
, , .
= 7,5, 6,5 7,2. 7,5 - , 1.
, , 2 = 7,5, - 2, , , 7,5.
, - 2, , .. . - 2, , , , 1,57 1 , .
= 1,57*Fe + (C. .)
- 2, , \;
Fe , \;
C. 2 , \;
2 \ = 7,5 ( 1).
2 :
. = . = 1,57* Fe + C. 1,57* Fe - C. + . = .
540 90 3\2 . . 4 3\3. Δ. , :
,
. \3 . 6.
, ( ), 10 3\2. .6.
1. :
f = 2
2. 50-90 3\2
= * α* β, \
3. = 1,57* Fe +
4. S (.6) 2\3
1